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Date: Fri, 7 Oct 2011 22:08:29 +0000 (UTC)
From: "Jason Rutherglen (Commented) (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Commented] (LUCENE-3498) IndexReaderFactory for Lucene
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    [ https://issues.apache.org/jira/browse/LUCENE-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13123250#comment-13123250 ] 

Jason Rutherglen commented on LUCENE-3498:
------------------------------------------

Simon, I think you'd be surprised at how many of the current [uber-complex] features of Lucene, few people use (readerTermsIndexDivisor, termIndexInterval, mergedSegmentWarmer are great examples, that are not-so-complex in IWC alone).  For people who use this, the factory system is a lot more user friendly than subclassing.

A protected method in IW doesn't take into account opening a DR from a DR, to do that please commit LUCENE-3497.  If that gets in, we can open an issue to add a protected method to IW.
                
> IndexReaderFactory for Lucene
> -----------------------------
>
>                 Key: LUCENE-3498
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3498
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: core/index
>    Affects Versions: 3.4, 4.0
>            Reporter: Jason Rutherglen
>            Priority: Minor
>         Attachments: LUCENE-3498.patch
>
>
> An IndexReaderFactory can be used by IndexWriter and DirectoryReader to enable subclasses of DR to be instantiated by Lucene, automatically.

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